[Wayland-bugs] [Bug 766341] Do not rely on memfd as it requires a fairly recent kernel

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=766341

--- Comment #17 from Ray Strode [halfline] <rstrode at redhat.com> ---
Review of attachment 327976:

::: gdk/wayland/gdkdisplay-wayland.c
@@ +1132,1 @@
   ret = syscall (__NR_memfd_create, "gdk-wayland", MFD_CLOEXEC);

so i'm not handling EINTR here, which means we could end up using yucky shm fds
on memfd systems sporatically.  I'm also not remembering to use fall back for
subsequent calls so users stuck with yucky shm fds will do futile memfd_create
calls every time.

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